/*
 * The MIT License
 *
 * Copyright (c) 2016-2018, Torsten Paul <torsten.paul@gmx.de>,
 *                          Marius Kintel <marius@kintel.net>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
#include <stdlib.h>
#include <iostream>

#include "use.h"

namespace libsvg {

const std::string use::name("use");

use::use()
{
}

use::~use()
{
}

void
use::set_attrs(attr_map_t& attrs, void *context)
{
	shape::set_attrs(attrs, context);
	this->x = parse_double(attrs["x"]);
	this->y = parse_double(attrs["y"]);

	//Note: width, and height have no effect on use elements, unless the element referenced has a viewbox - i.e. they only have an effect when use refers to a svg or symbol element.
	//Lets store them, but I am not going to use them.
	this->width = parse_double(attrs["width"]);
	this->height = parse_double(attrs["height"]);

	std::string temp_href = attrs["href"];
	if (attrs["href"].empty() && !attrs["xlink:href"].empty())
	{
		temp_href = attrs["xlink:href"];
	}

	if (this->href != temp_href)
	{
		this->href = temp_href;
		if (href.rfind("#", 0) != 0)
		{
			printf("<use> can only use references to ids in the href field (starting with #). Error in element type %s with id: %s\n", this->get_name().c_str(), this->get_id().c_str());
		}
	}

	//apply the x/y coordinates to all the children by using a transform
	std::stringstream s;
	s << "translate(" << this->x << "," << this->y << ")";
	this->transform = s.str();
}

const std::string
use::get_href_id() const
{
	if (href.rfind("#", 0) != 0)
	{
		return nullptr;
	}
	return href.substr(1); //remove the #
}

std::vector<std::shared_ptr<shape>>
use::set_clone_child(shape* child)
{
	shape* copy = child->clone();
	copy->set_parent(this);
	auto cloned_objects = copy->clone_children();
	cloned_objects.insert(cloned_objects.begin(), std::shared_ptr<shape>(copy));
	return cloned_objects;
}

const std::string
use::dump() const
{
	std::stringstream s;
	s << get_name()
		<< ": x = " << this->x
		<< ": y = " << this->y;
	return s.str();
}

}
